Specifications
CompuLab Ltd. IPC2 – Hardware Specification Page 61 of 83
5.4 RS232 Serial Interface
IPC2 design provides three RS232 serial communication ports. COM1/2 support 2-wire interface
(Tx/Rx) and COM3 support full RS232 signal set, when COM1 implemented via Embedded
Controller UART and COM2/3 by UARTs located in Super-I/O Controller. Due to small dimension
physical port is implemented with ultra mini serial connector with the pinout in the table below.
Figure 16 – IPC2 Serial Connectivity
Lynx Point LP
PCH
Serial
COM3
Serial
COM1
Embedded
Controller (EC)
Renesas H8S/2113
16-bit MCU
SMSC SuperIO
SIO1007
RS232
transceiver
RS232
transceiver
RS232_COM3_TX
RS232_COM3_RTS
RS232_COM3_RX
RS232_COM3_CTS
RS232_COM3_DTR
RS232_COM3_DSR
RS232_COM3_RI
Serial
COM2
RS232_COM2_TX
RS232_COM2_RX
RS232_COM1_TX
RS232_COM1_RX
UART_COM3_TX
UART_COM3_RTS
UART_COM3_RX
UART_COM3_CTS
UART_COM3_DTR
UART_COM3_DSR
UART_COM3_RI
UART_COM2_TX
UART_COM2_RX
UART_COM1_TX
UART_COM1_RX
LPC
RS232
transceiver
Table 34 – Common COM port mapping
COM port
UART type
UART Controller
IO address
COM1
Tx/Rx
Embedded Controller
0x03F8 – 0x03FF
COM2
Tx/Rx
SuperIO Controller
0x02F8 – 0x02FF
COM3
Full
SuperIO Controller
0x03E8 – 0x03EF